ACTA PETROLEI SINICA ›› 2009, Vol. 30 ›› Issue (1): 100-103.DOI: 10.7623/syxb200901021

• Oil Field Development • Previous Articles     Next Articles

A computation method for reservoir permeability by combining NMR log and capillary pressure data

XIAO Liang1, LIU Xiaopeng2, MAO Zhiqiang1   

  1. 1. Faculty of Resource and Information Technology, China University of Petroleum, Beijing 102249, China;
    2. Geology Exploration and Development Research Institute, Sichuan Petroleum Administration Bureau, Chengdu 610051, China
  • Received:2008-04-27 Revised:2008-08-06 Online:2008-11-25 Published:2010-05-21

结合NMR和毛管压力资料计算储层渗透率的方法

肖亮1, 刘晓鹏2, 毛志强1   

  1. 1. 中国石油大学资源与信息学院, 北京, 102249;
    2. 四川石油管理局地质勘探开发研究院, 四川成都, 610051
  • 作者简介:肖亮,男,1981年6月生,2004年毕业于长江大学,现为中国石油大学(北京)博士研究生,主要从事测井解释及测井新技术应用方面的研究工作.E-mail:liangxhb@yahoo.com.cn
  • 基金资助:

    中国石油天然气集团公司应用基础研究项目(DX-2006-442)资助

Abstract:

Based on the fact that NMR T2 distribution and capillary pressure curves can reflect the reservoir pore structure, a novel method was presented to calculate reservoir permeability by combining NMR log and capillary pressure data. A correlation model between Swanson parameter and rock permeability was established by analyzing plenty of core samples with mercury-injection and NMR log data. Considering the problem that capillary pressure data are limited by their quantity, the novel method was presented to acquire Swanson parameter from NMR T2 geometric mean value and to calculate reservoir permeability consecutively. The permeability data in low-porosity and low-permeability reservoir of Well A calculated by the method are close to the result of air permeability obtained from core analysis, which indicates the accuracy and applicability of this method.

Key words: nuclear magnetic resonance (NMR) log, capillary pressure curve, Swanson parameter, reservoir permeability, computation method

摘要:

基于核磁共振(NMR)测井驰豫时间分布和毛管压力曲线均反应储层孔隙结构的事实,提出了将NMR测井和毛管压力资料相结合计算储层渗透率的新方法。通过对大量压汞和核磁共振测井实验岩心样品的分析,建立了Swanson参数与岩石渗透率的关系模型。为解决压汞数据受岩心样品数量限制的问题,提出了利用核磁共振横向弛豫时间几何平均值求取Swanson参数,可以连续地计算储层的渗透率。对某油田A井低孔隙度、低渗透率储层实际资料的处理表明,用新方法计算得到的渗透率与岩心分析的空气渗透率吻合较好,验证了该方法的准确性和广泛适用性。

关键词: 核磁共振测井, 毛管压力曲线, Swanson参数, 储层渗透率, 计算方法

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